Critical Height Sampling for Stand Volume Estimation
Abstract:Critical height sampling as a technique for estimating stand volume without using volume tables is explained. Based on point sampling for tree selection, the stand volume estimator is the product of the point sampling basal area factor and the sum of critical heights of trees in the sample. The critical height of a tree is the height to a point on the bole where stem diameter exactly subtends the horizontal sighting angle from a vertical line originating at the sample point. The estimator is shown to be unbiased when either of two published tree taper models is assumed. Variances of the ongrowth and nongrowth components of the volume growth estimator are shown to be less than the variances of these components in the compatible estimator for growth when a random spatial distribution of trees is assumed. Forest Sci. 31:899-911.
Document Type: Journal Article
Affiliations: Professor of Forest Biometrics, School of Forest Resources, University of Georgia, Athens, GA 30602
Publication date: December 1, 1985
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- Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
Forest Science is published bimonthly in February, April, June, August, October, and December.
2015 Impact Factor: 1.702
Ranking: 16 of 66 in forestry
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